Operation Northwoods. This 1962 white paper from the U.S. Joint Chiefs of Staff suggested possible justifications for a war against Cuba, including a never executed idea in which the CIA would detonate a drone aircraft to make it look like Fidel Castro had shot down an American passenger plane. Project for the New American Century [PNAC]. As evidence of the motives behind a government-planned 9-11, theorists point to one 28-word passage in a September 2000 [PNAC] report written with help from the likes of Scooter Libby and Paul Wolfowitz: "The process of transformation, even if it brings revolutionary change, is likely to be a long one, absent some catastrophic and catalyzing event -- like a new Pearl Harbor. "Theorists point to Attorney General John Ashcroft's decision to stop flying commercial [planes] in the summer of 2001, as well as a San Francisco Chronicle report that Mayor Willie Brown received a warning of 9-11, as evidence that some people had foreknowledge of the attack. World Trade Center 7. This building -- the last to fall on 9-11 -- is key to all controlled-demolition theories. Its sudden fall onto its own footprint, and developer Larry Silverstein's reference on TV to telling the FDNY to "pull it," are seen as evidence that WTC7 was rigged to fall. Meanwhile, a convincing official explanation hasn't exactly been forthcoming.